Range Extender
A Tesla patent application published on February 19, 2026, outlines a dual-battery system for electric vehicles, including a trailer-mounted auxiliary pack. Filed in August 2024, it details integration with the primary battery via advanced management modes. The design addresses past issues with the cancelled Cybertruck range extender.
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Tesla Cybertruck owners are exploring a class-action lawsuit against the company for allegedly misleading promises about a range-extender battery pack that was later canceled. One owner from Los Angeles claims he purchased his vehicle relying on the promised feature, which would have extended its range to 450 miles. The pack's cancellation in May 2025 has left some owners dissatisfied with the truck's actual range of about 240 miles on an 80% charge.